/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieScenePlayback.h
Get a range that encompasses the last evaluated range in OutputRate space.
An optional evaluation range in OutputRate space.
[TOptional](API\Runtime\Core\IO\TOptional)< [FMovieSceneEvaluationRange](API\Runtime\MovieScene\Evaluation\FMovieSceneEvaluationRange) > GetLastRange() const